Atul asked: “Sony Vaio laptop. I purchased it about 4-5 years ago and the battery is dead. I wanted to replace the battery. Do you have any suggestions of places I can go online to purchase a battery?”
There are plenty of places to buy a replacement, just keep in mind that 4-5 years may be the expected life of the laptop.
Not many people have 4 or 5 year old laptops that work well, and even fewer people have 4 or 5 year old laptops they’re willing to spend money on. That means that there are no guarantees that you will be able to find the battery you need for a reasonable price. Having said that, it’s likely that you will be able to find the battery, whether the price is worth the buy or not, we’ll leave up to you.
The first place to try would be Sony’s own website, they do sell parts there. If you strike out though, Amazon, BestBuy, Target, LaptopBatteryExpress.com, and many more sites sell laptop batteries. We don’t know your computer’s specific model, but if you search for it on any of those sites, a battery replacement will probably pop up.